| 单词 | iron sulphate |
| 释义 | > as lemmasiron sulphate iron sulphate n. a sulphate of iron; spec. (a) iron( ii) sulphate (ferrous sulphate), FeSO4, a green crystalline solid used in dyeing, nutritional supplements, water purification, etc.; = green vitriol n. at green adj. and n.1 Compounds 1d(d); (b) iron( iii) sulphate (ferric sulphate), Fe2(SO4)3, a yellow crystalline solid used as a mordant in dyeing. ΚΠ 1790 W. Nicholson tr. A.-F. de Fourcroy Elements Nat. Hist. & Chem. (new ed.) II. 193 A small portion of sulphate of iron or martial vitriol [Fr. un peu de dissolution de vitriol martial].] 1834 Mechanics' Mag. 5 Apr. 27/2 Iron sulphate (green vitriol) 2 oz., per oz. 2d. 1912 A. H. Phillips Mineralogy ii. xii. 540 Iron sulphates are not common in nature, as owing to their solubility they may occur only under very restricted conditions. 1986 J. A. Samson Trop. Fruits (ed. 2) vii. 207 Chlorosis of leaves..can be controlled by low volume spraying with iron sulphate or a chelate. 2002 Gazette (Montreal) (Nexis) 14 Sept. b2 The problem is that ink rich in iron sulphate makes the paper break down faster. < as lemmas |
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